williamson



(No Model.) I 6 SheetsSheet 1. D. WILLIAMSON.

CURRENT COLLECTING DEVICE FOR DYNAMO ELECTRIC MACHINES.

No. 355,738. Patented Jan. 11, 1887.

6 Sheets-Sheet 2 Patented Jan. 11, 1887.

j 'vw cwl oz a {1171 0614 m 6) I 7 (N0 Model.)

D WILLIAMSCN CURRENT COLLECTING DEVICE FOR DYNAMC ELECTRIC MACHINES.

witnesses 6 Sheets-Sheet 3.

D. WILLIAMSON.

CURRENT GOLLEGTING DEVICE FOR DYNAMO ELECTRIC MACHINES. No 355,738.Patented Jen. 11,1887.

(No Model.)

H m w mww r Wm Lama We! Q2 6 Sheets-Sheet 4.

Patented Jan. 11, 1887.

D WILLIAMSON CURRENT COLLECTING DEVICE P03 DYNAMO ELECTRIC MACHINES. No.355,738.

(No Model.) 6 Sheets-Sheet 5.

D. WILLIAMSON CURRENT COLLECTING DEVICE FOR DYNAMO ELECTRIC MACHINES.

No. 355,738. Patented Jan. 11,1887.

(No Model.) 6 Sheets--Sheet 6 D. WILLIAMSON.

GURRENT GOLLEGTING DEVIGE FOR DYNAMO ELECTRIC MACHINES.

No. 355,788. Patented Jan. 11 1887.

5W0 onto 8 l witnesses PATENT OFFICE.

DAVID WlLLlAllllSON, OF NEW YORK, N. Y.

CURRENT-COLLECTING DEVICE FOR DYNAMO-ELECTRIC MACHINES.

BPECIFICATION forming part of Letters Patent No. 355,738, dated January'11, 1887.

Application filed June 14, 1886.

To all whom it may concern.-

Be it known that 1, DAVID WILLLiMsoN, of the city, county, and State ofNew York, have invented certain new and useful Improvements inCurrent-Collecting Devices for Dynamo- Electric Machines, of which thefollowing is a specification, illustrated by the accompanying drawings.

This invention is designed to facilitate the manipulation of the brushesof a dynamoelectric machine, and relates to mechanism by which suchbrushes may be adjusted and slip ported in desired positions about acommutator. ings, in which- Figure 1 is an end view of my inventionapplied and adjusted to support a brush in contact with a commutator.Fig. 2 is an end view of the same adjusted and applied to support thesame brush not in contact with said commutator. Fig. 3 is a plan View ofsaid brush and the mechanism by which the same is adjusted. Fig. 4 is asection on a a of Fig. Fig. 5 is a section on Z) Z) of Fig. 3. Fig. 6 isa modification of Fig. 5, showing a modiiied construction. Fig. 7 is anend view of my invention in a modified form, applied and adjusted tosupport a pair of brushes in contact with a commutator. Fig. 8 isasection on c c in Fig. 7. Fig. 9 is a vertical section through thecenter of the upper brush and brush-holder of Fig. 7. Fig. 10 is apartial section on c e in Fig. 7; and Fig. 11 is an end view of myinvention, in a modified form, applied and adjusted to support twobrushes, one of which is in contact with a commutator and the other ofwhich is not in such contact.

In Fig. 7 the numeral 1 denotes the commutator of a dynamo-electricmachine, whether motor or generator, while 2 is the armatureshaft. 3 isa portion of-a yoke by means of which that shaft is supported, and 4 isa metallic bushing between said shaft and yoke.

In Figs. 1, 2, and 11 the same parts are indicated diagrammatically byconcentric circlcs, which are adjacent to the brushes, hereinaftermentioned. Numeral 5 denotes a straight cylindrical brass rod, which hasa collar, 6, formed integrally with said rod, and is provided with aterminal nut, 7. This rod passes through a hole in the head 8 of arm 9of yoke 32, hereinafter described, is insulated Such mechanism is shownin said draw- Serial No. 205,056. (No model.)

therefrom, and is supported thereby at a suit able distance fromcommutator 1. Head 8 and the material employed to insulate the sameoccupy all the space between collar 6 and nut 7, so that red 5 cannotmove lengthwise in head 8. Rod 5 is also provided with a cylindricalsleeve, 10, which is of sufficient length to accommodatethe brushes,which are to be mounted thereon in the manner hereinafter described, andhas an enlargement or head, 11, contiguous to collar 6. Head 11, as seenin Figs. 3, 4, and 5, consists of two collars or annular rings, 12 and13, which are at right angles to the longitudinal axis of rod 5, areperipherally connected with each other in a rigid manner by bridge 14,and are separated from each other by the intermediate collar, 15, whichoccupies all the space on rod 5 between rings 12 and 13, and is held inposition upon that rod by set-screw 16. In the outer part of collar 15are two or more indenta tions or circumferential sockets, 17, adapted toreceive the end or point of pin 18, as seen in Figs-4 and 5. This pin ismounted upon bridge 14, radially as to collar 15, in such a position asto be brought successively over each socket 17 of Fig. 4 by the partialrevolution of bridge 14 about collar 15. Pin 18 is provided with aspring, 19, which presses that pin constantly toward the center ofcollar 15. This spring is conveniently located within a tubularextension of bridge 14. Pin 18 is also pro vided with an exposed head orlinger-piece, 20. Upon sleeve 10 (see Figs. 1, 2, 3, 5, and 6) aremounted one or more brush-holders, 21, of the general. descriptionfollowing: Each brush- 'holder consists of a pair of clamping-plates,22, a clamp, 23, collars 24 and 25, fitted upon sleeve 10, a spring, 26,and a set-screw, 27. The brush 28 consists of a number of rectangularplates or laminations of copper, and may be regarded as being of anyconvenient form or structure. The clamping-plates 22 are of brass, thinand flat. They are as wide as brush 28, and as long as is necessary tohold that brush with all necessary rigidity against commutator 1. Saidplates, being inserted in clamp 23, are turned slightly away from eachother at one end, to allow the convenient insertion of the brush betweenthem, and are provided with suitable pins or other stops, 29, projectingfrom said plates in convenient positions to engage the body of clamp 23and thus to prevent said plates from slipping from their properpositions during the-adjustment of the brush within said clamp. Thelatter consists of a single piece of brass, which is of generalrectangular form, has a suitable slot for the introduction and retentionof plates 22 and brush 2S, and is provided with a set-screw, 42, bymeans of which said plates and intermediate brush are held in positionin said slot. The latter is further provided with two parallel rings orcollars, 24, projecting from clamp 23 asintegral parts thereof, andseparated from each other by a separate ring or collar, 25, which isconnected with clamp 23 by a metallic spring, 26, and is held inposition upon sleeve 10 by set-screw 27. Collars 24 have no motionlengthwise of sleeve 10, by reason of the fixed position of collar 25,but havea limited capacity of rotary mot-ion, dependent upon theelasticity of spring 26.

The device above described is presented in Fig. 6 in a modified form, inwhich head 8 of arm 9,bei n g made fast to rod 5 by set-screw 30, andprovided with slots 17 for the reception of pin 18, takes the place ofcollar 6. In this case the collars 6 and 12 of Fig. 5 are omitted andsleeve 10 is held between head 8 of arm 9 and a terminal nut, 31, on rod5.

Figs. 7, 8, 9, and 10 present further-modifications and adaptations ofthe same invention. Yoke 32 is shown in Fig. 7. This yoke consists of acentral ring, 33, which is fitted like a sleeve over yoke 3, and isadjustable thereon by a set-screw, and of two arms, 9, extending fromthat ring in opposite directions and sup porting two rods, 5, inparallel positions on opposite sides of shaft 2, in the manner abovedescribed. Two collars, 15, severally located upon said rods 5 and 5,are fastened, respectively, to said rods by set-screws 16 and 16, arejoined together by means of two projecting arms, 31 and 31, and anintermediate insulated link, 35. One of said collars is provided with ahandle projecting radially therefrom and consisting of two pivoted arms,36 and 37. Arm 36 is immovable relatively to its collar 15, while arm37, being pivoted to arm 36, is movable relatively thereto. These armsare normally held apart by a spring, 38. Arm 37 is provided with a shortarm, 39, whose point in its normal position is held by the force ofspring 38 in one or another of three several slots, etl, 41, and 4.1, inthe contiguous edge of sleeve or collar 40, but is withdrawn from saidslots whenever arms 36 and 37 are pressed together. Each sleeve 4.0 isprovided with a binding-post, 44.

Figs. 7, 9, and 11 present the clamping-plates 22 and 22 in a modifiedform, in which each plate, being made somewhat longer than in theprevious figures, is bent over in such a manner that one end of thesame, acting as a spring upon the outside of the clamp, holds that plateconstantly in its position of pressing contact with the contiguous innersurf ace of said clamp. Each plate 22 is prevented from movinglengthwise in the clamp by suitable pins, 29, as before. The bent-overend of the upper clamping-plate,22,is provided with a slot, 43, dividingthe end of said plate into two parallel strips of brass and admittingtheset-screw 42 between them. The adaptation shown in Fig. 11 consistsin placing two brush-holders and the brushes contained in the same uponone and 7 the same rod,-5, in positions of inversion relatively to eachother.

The remaining features of construction involved in this invention willsufficiently appear from the drawings and from the mode of operation,which is now to be explained.

Such being the construction of this currentcollecting device, itsoperation requires but little description. Each brush-holder 21 isbyset-screw 27 fixed in such a position relatively 8 to the commutator andto the rod or sleeve upon which such holder is immediately mounted thatbrush 28, which is held thereby, is in a position of contact or of nocontact with said commutator, according as the point of the pin or shortarm before mentioned is permitted to enter one or another of slots 17and $1.

It is apparent fromthe described construction that any number of brushes28, having been once adjusted to the desired degree of 9 pressure uponthe commutator, may be thrown out of contact with the commutator andbrought into contact with the same repeatedly, without any need ofreadjustment, by merely changing the position of pin'lS or arm 39 from Ione' to another of said slots or sockets 17. In case of two oppositebrush-holders mounted at one and the same side of the commutator,saidholders are also in the same manner fixed in such a position relativelyto each other that I the brushes 28, which are held thereby, cannot bothbe in contact with the commutator at one and the same time, and are bothseparated from the commutator whenever said pin or short armis,permitted to enter the middle I slot or socket, as shown in Fig. 13.Each brush 28, being inserted between plates 22 in the manner describedand shown, maybe conveniently moved forward between them, or withdrawnwhen worn out, by loosening I set-screw 42. The peculiar advantage ofthe curved clamping-plates 22 22, (shown in Figs.

7 10, and 13,) lies in the circumstance that,by reason of the clampingpressure of the same upon the upper and lower jaws, respectively, I ofclamp 23, these plates are retained in position when the brushes are forany purpose loosened or withdrawn. At the same time these plates areeasily removed by hand.

The construction described in connection I with Fig. 11 is speciallyadapted to be used in connection with electric motors in which eitherset of brushes is used alone, according as the motor turns in onedirection or in the other. I I claim as my invention and desire tosecure by Letters Patent- 1. A brush-holder having a slot, a removableclamping-plate which is provided with pins or other stops projectingfrom said plate in positions to engage the edge of said slot, and isheld in a position of actual or approximate contact with the innersurface of said slotby an extension of said plate bent over as a springto a position of engagement with the outer surface of said brush-holder, substantially as and for the purpose specified.

2. A rod,a sleeve upon said r0d,and aspringstop whereby said rod andsleeve can be firmly set at will in any one of several predeterminedpositions relatively to each other, in combination with an insulatedarm, an adjustable brush-holder,and a set-screw which is adapted to fixsaid brush-holder in desired positions upon said rod or sleeve,substantially as and for the purpose specified.

3. A rod, a sleeve upon said rod, and astop whereby said rod and sleevecan be firmly set at will in any one of several predetermined positionsrelatively'to each other, in combination with a brush-holder which ismounted ,upon said rod or sleeve and a set-screw which is adapted tofasten said holder in desired positions about said rod or sleeve,substantially as and for the purpose specified.

4. A cylindrical rod of brass or other conductive material, a sleeve oflike material surrounding said rod, and a spring-stop whereby saidsleeve can be firmly set in any desired predetermined position upon saidrod, in combination with a brush-hold er which is mounted adj ustably inany desired position upon said rod or sleeve, substantially as and forthe purpose specified.

5. A cylindrical rod, a rotatable sleeve surrounding the same, and anadjustable stop whereby said rod or sleeve may be firmly set inpredetermined relative positions, in combination with a spring-seatedbrush-holder, substantially as and for the purpose specified.

6. Two cylindrical sleeved rods, which are supported in parallelpositions by an insulated yoke and are provided with two insulated armsjoined by a link, in combination with an adjustable spring-stop betweenone of said rods and the sleeve which is thereon, substantially as andfor the purpose specified.

7. A cylindrical rod of brass or other electrically-conductive material,a sleeve surrounding said rod abrush-holder which is mounted in anadjustable manner upon said rod or sleeve, and an insulated armprojecting therefrom, all duplicated, supported by an insulated yoke andlinked together, in combination with an adj ustable spring-stop wherebysaid rod can be firmly set in any one of two or more predeterminedpositions relatively to said sleeve, substantially as and for thepurpose specified.

8. A cylindrical rod, a sleeve upon said rod, a brush-holder mounted adjustably upon said rod or sleeve, a brush in said holder, an armprojecting from said arm or sleeve, all duplicated, supported by aninsulated yoke about the 'armatureshaft of a dynamo-electric ma chine ormotor, and provided with a link by which said arm and'the duplicatethereof are joined together, and with an adjustable springstop betweensaid rod and sleeve, substantially as and for the purpose specified.

In testimony whereof I have herento set my name in the presence of twowitnesses.

I DAVID wILLiAMsoN. \Vitnesses:

RICHARD H. BIA'lI-I'ER,

Anson O. Housn.

